Can be used to hint to the JNLP client that the RIA wants to be registered with the operating system as the primary handler of certain extensions and a certain mime-type. If this element is included, either the offline-allowed element must also be included, or the href attribute must be set for the jnlp element.

1.5.0

extensions

A list of file extensions (separated by spaces) that the RIA requests it be registered to handle.

The name of the class containing the public static void main(String[]) method of the installer.

1.0

Yes

Encoding JNLP Files

Java Web Start software supports encoding of JNLP files in any character encoding supported by the Java platform. For more information about character encoding in the Java platform, see the
Supported Encodings Guide. To encode a JNLP file, specify an encoding in the XML prolog of that file. For example, the following line indicates that the JNLP file is encoded in UTF-16.